V = 1/3 B * h B = ??? h = 4 cm V = 48 cm^3 48 = 1/3 * B * 4 Multiply both sides by 3 48 * 3 = B * 4 144 = B * 4 Divide by 4 144/4 = B 36 = B Since the base is a square the area of the base = s^2 s^2 = 36 Sqrt(s^2) = sqrt(36) s = 6 cm <<<<==== answer.